Anime Crossover: I Can Trade Everything

Finite or infinite life... ordinary or extraordinary soul... extreme or mundane emotions... or even supernatural abilities... Here, tragic fate is something everything can be traded, everything can be changed. Who you are, where you come from. Whether you are an absolute villain, a compassionate saint, or an ordinary person, the moment you arrive here, your fate may change, provided you are willing to give it up. Here, everything follows an absolutely 'fair' trade, and everything can be traded, including you and me. So, the Bilibili girl... hiding on the sofa...